James glenn



No. 10,302. PATENTED DEC. 6, 1853'. J. GLENN. TIME INDICATOR.

. lnvenlor:

UNITED STATES PATENT OFFICE.

JAMES GLENN, OF NIH" YORK, N. Y.

ILLUMINATED CLOCK.

Specification of Letters Patent No. 10,302, dated December 6, 1853.

To all whom it may concern:

Be it known that I, Janus (irLENN, of New York, in the county of NewYork, State of New York, have invented a new and useful Machine forIndicating the Time at Night, entitled Glenn's Night and Day TimeIndicator; and I do hereby declare that the following is a full, clear,and exact description of the construction and operation of the same,reference being had to the annexed drawings, making a part of thisspecification, and to the figures of reference marked thereon.

The nature of my invention consists in making two circular brass plateshaving the figures of time out through them; one plate having the hourfigures only, cut in Roman characters, the other plate having the minutefigures only cut in Arabic characters, both of which are made to revolveby clockwork between the light of a lamp, or gaslight, and twomagnifying lenses, which throws the images of two divisions of theminute figures and one division of the hour figures on a screen or plateof ground glass in front. The figures are thus represented in light, andare seen more distinctly than by any other method at present in use.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation as follows, referencebeing had to the accompanying drawing.

Letter A, N is a wheel with twelve openings in it with teeth in the edgeto connect with wheel D which is supposed to be part of a clock makingwheel A N to go around in one hour. Fig. A, N is a thin brass wheel orany other metal that will answer with holes through it, in the shape ofthe figures as on the drawing for minutes. Figs. B, N and B, N are madethe same as in drawing of their holes through.

E N are cut for to show hours.

A N is fastened to A N so as to form the back; and through the openingsthe minutes will show. There is a pin at 00, in A N that when it hasmade one revolution it will catch in the projecting arm of B N and turnit one notch, which will change the wheel B N one hour, B N beingfastened to B N in the same manner as A N and A N are. A N and A N formwhen put together one wheel and the same with B N and B N they are thenplaced as seen in the drawing, in front of a magic lantern placed in anysuitable frame for revolving so that the frame does not intercept thelight.

D represents the large lens, and E, the small one. F the lamp, G thereflector.

H shows the hour and minutes, as reflected on the plate of ground glass,magnified according to the power of the lens used in the lantern wherebythey can be seen at night to a great distance, which is the object ofthe invention.

That I claim as my invention, and desire to secure by Letters Patent, is

The construction of two circular dialplates having the figures of timeout through them in such a manner, which being made to IG'VOlTE by meansof clockwork and by means of a light and two magnifying lenses; the timeis represented on a plate of ground glass in front in white light, whichmay be perceived to a greater distance and more distinctly than by anyother method at present in use.

JAMES GLENN.

Witnesses IIENRY A. Mo'rr, JAMES M. BEATTIE.

